10-4 and Beyond: A Trucker's Ten-Codes, and What They Say About Commercial Auto Insurance

Knoxville, TN—October 2, 2026

Every October 4, the trucking community marks National Truckers Day, better known on the CB as "10-4 Day." The numbers nod to the ten-code every driver knows—10-4, message received—and to the roughly 3.5 million professional drivers the American Trucking Associations counts on the road. 

The ten-codes grew up as working shorthand, a way to say a lot in a few syllables over a crowded channel. Lined up in a row, a handful of them also describe what commercial auto insurance ought to do for the owner-operators and fleets who move the freight.

10-4—Message received. 

The point of the code is confirmation: the other end heard what was said. In commercial auto insurance, that's rarer than it should be. Many operations are rated against the industry's losses rather than their own conduct, so a careful operator can end up paying for records that were never theirs. A carrier that copies an operation pays attention to how it actually runs—its inspections, its logs, the miles behind it—and lets that record, not the market's, shape what comes next.

STAR Mutual RRG’s look at how HOS compliance, CSA data and safety records factor into commercial truck insurance digs into that connection.

10-20—What's your twenty? 

On the radio it asks for a location. In commercial trucking insurance it's a question about reach. Freight rarely respects a single state line, and neither do the rules—authority, filings and limits shift from one jurisdiction to the next. Coverage that spans many states and vehicle classes, placed through a single independent agent, spares an operation the work of stitching a program together lane by lane.

10-9—Say again. 

Drivers repeat a call when the first one didn't come through. Too often that's the experience of learning whether a risk even fits a carrier's appetite: a submission sent into silence, a week lost, an answer that lands as a maybe. Clarity is its own service. A straight yes or no, with the reason behind it and a sense of what would change it, is worth more than a vague promise—and it lets an agent get on with the day.

10-7—Out of service. 

Every driver knows the value of keying off for a while. The demands of a long haul are real, and the operations that last build rest into the plan rather than treating it as lost time.

STAR Mutual RRG's guidance on managing stress on long trips looks at what drivers and fleet managers can do to ease those demands.

10-33—Emergency. 

This is the one no one wants to key up. When a loss does happen, what matters is who picks up the file. STAR Mutual RRG works claims through a trucking-focused team that understands how these operations run, where downtime is often the real expense. 

Back to 10-4. 

The codes last because they're honest—short, exact, no wasted words. That's not a bad standard for the commercial auto insurance that covers the people who use them. National Truckers Day extends the recognition of September's National Truck Driver Appreciation Week into the fall—a fair moment to recognize the drivers behind the freight, and to ask that the coverage behind them be just as clear.

To every professional driver on the road this October 4: 10-4.

STAR Mutual Risk Retention Group is a commercial auto liability insurer focused on the trucking and transportation sector. It serves transportation businesses, owner-operators and contractors through appointed independent agents in 40 states. Disciplined underwriting, performance-based pricing, trucking-focused claims expertise and technology-enabled service come together in a program built for safety-first operators and the independent agents who serve them.

Contact Information:

STAR Mutual RRG
Email: info@starrrg.com
Phone: (855) 569-7827